2-9 Percents.

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Presentation transcript:

2-9 Percents

What: Variable (x) Is: equals sign (=) Of: Multiply

Problem 2: Finding a Percent using the Percent Equation What percent of 56 is 42?

What percent of 90 is 54?

Problem 3: Finding a Part A dress that normally costs $38.50 is on sale for 30% off. What is the sale price of the shirt?

Problem 3: Finding a Part What is 72% of 150?

What is 20% of 3?

Problem 4: Finding a Base 125% of what number is 17.5?

30% of what number is 12.5?

Simple Interest Formula 𝐼=𝑃𝑟𝑡 𝐼=𝐼𝑛𝑡𝑒𝑟𝑒𝑠𝑡 𝑃=𝑃𝑟𝑖𝑛𝑐𝑖𝑝𝑎𝑙 𝑟=𝑟𝑎𝑡𝑒 𝑎𝑠 𝑎 𝑑𝑒𝑐𝑖𝑚𝑎𝑙 𝑡=𝑡𝑖𝑚𝑒 (𝑖𝑛 𝑦𝑒𝑎𝑟𝑠)

Problem 5: Using the Simple Interest Formula If you invest $50 at a simple interest rate of 3.5% per year for 3 years, how much interest do you earn?

Problem 5: Using the Simple Interest Formula You deposit $125 in a savings account that earns a simple interest rate of 1.75% per year. You earned a total of $8.75 in interest. For how long was your money in the account?